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首页> 外文期刊>Plasma physics and controlled fusion >TJ cm(-3) high energy density plasma formation from intense laser-irradiated foam targets composed of disordered carbon nanowires
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TJ cm(-3) high energy density plasma formation from intense laser-irradiated foam targets composed of disordered carbon nanowires

机译：TJ厘米（-3）高能量密度等离子体从激光激光照射泡沫靶构成的碳纳米线组成的强能密度等离子体形成

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摘要

High energy density plasma formation from intense laser-irradiated foam targets composed of disordered carbon nanowires is investigated using three-dimensional particle-in-cell simulations. It is shown that due to the unprecedentedly high laser energy absorption rate of the foam target, approximately three times larger as compared with simple solid targets, the plasma energy density reaches an unexplored TJ cm(-3) regime at 10(23) W cm(-2) laser irradiation. In addition, nanowire thermal expansion caused by prepulse heating is considered. We find that after expansion, the target becomes relativistically transparent to the main pulse. The average value of particle energy density decreases slightly and its distribution tends to resemble that of solid targets. Furthermore, energy density scaling with laser intensities is given. It suggests that an even more extreme plasma state is reachable using ultraintense lasers, as the energy loss to photons caused by quantum electrodynamics effects is rather negligible.
机译：利用三维粒子模拟研究了由无序碳纳米线组成的泡沫靶在强激光辐照下形成高能量密度等离子体的过程。结果表明，由于泡沫靶具有前所未有的高激光能量吸收率，大约是简单固体靶的三倍，在10（23）W cm（-2）激光照射下，等离子体能量密度达到了未探索的TJ cm（-3）区域。此外，还考虑了预脉冲加热引起的纳米线热膨胀。我们发现，在膨胀后，目标对主脉冲在相对论上是透明的。粒子能量密度的平均值略有下降，其分布趋于与固体靶相似。此外，给出了能量密度随激光强度的变化规律。这表明，由于量子电动力学效应对光子造成的能量损失可以忽略不计，使用超强激光可以达到更极端的等离子体状态。

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